Author: Tony Werten
Date: 23:27:13 12/22/04
Go up one level in this thread
On December 22, 2004 at 16:43:58, Ulrich Tuerke wrote: >On December 22, 2004 at 14:31:15, Tony Werten wrote: > >>On December 22, 2004 at 12:23:01, Andreas Guettinger wrote: >> >>>On December 22, 2004 at 10:45:20, Rafael Vasquez wrote: >>> >>>>Hello, >>>> >>>>I´ve seen a lot of controversy on the "Crafty Clones" threads. >>>> >>>>But when Fritz implemented the null move algoritm in 1995, did beat >>>>Deep Thought (Hong Kong). >>>> >>>>Afterwards several engines (or most?) are using the null move technique. >>>> >>>>Can we call them "Fritz Clones" and ban then forever? >>>> >>>> >>>>:))) >>>> >>>>Rafael >>> >>>Correct me if I'm wrong, but I think Fritz was not the first with null move. >>>i. e. Fritz could be considered a Nimzo clone and would be banned too. :) >> >>No. It was Frans Morsch who first implemented the nullmove as is now in use, it >>was Chrilly Donninger who first published about it. > >No Tony, there are older publications. There is for instance the fine article by >Goetsch and Campbell in "Computers, Chess and Cognition", eds. Marsland and >Schaeffer, Springer 1990. > >This text had already contained all relevant suggestions, like recursive >null-move, R>1 etc.. If I am not wrong, then they had been the first to suggest >this thechnique. Well, that's a matter of opinion I think, that's why I wrote "as is now in use". The papers you describe do use a nullmove, but pure as a threat detection mechanism, while Frans used it as a part of search. My personal feeling is that that's quite different ( not only because one I think I could have come up with myself, and the other one most likely not) Debatable of coarse, also, this is based on the papers I read, you might be talking about different papers :) > >Chrilly had been the 1st to publish a bit of pseudo-code for this. Yes, and that has its own value of coarse, because that's what gave it to us, not Frans' work. BTW, I seem to remember that Chrilly did not only give pseudo code, but also wrote a simple chessprogram with the code included. ( Minimax ?) Tony > >Uli > >> >>Tony >> >>> >>>regards >>>Andy
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.